Within 2 or 3 minutes after issuing
ip link set bond1 mtu 9000
I get one "NETDEV WATCHDOG: eth2: transmit timed out" to the console, and
then this starts to repeat:
BUG: soft lockup detected on CPU#0!
[<c0103667>] show_trace_log_lvl+0x19/0x2e
[<c010368e>] show_trace+0x12/0x14
[<c010377a>] dump_stack+0x14/0x16
[<c0134964>] softlockup_tick+0x9f/0xae
[<c0120f38>] run_local_timers+0x12/0x14
[<c0120d89>] update_process_times+0x3e/0x63
[<c010ceb0>] smp_apic_timer_interrupt+0x6f/0x7e
[<c010337c>] apic_timer_interrupt+0x28/0x30
[<d088d5b3>] skge_tx_clean+0x1d/0x87 [skge]
[<d088d663>] skge_tx_timeout+0x46/0x4c [skge]
[<c02b0854>] dev_watchdog+0x79/0xb9
[<c0120ec9>] run_timer_softirq+0x10e/0x16b
[<c011cebb>] __do_softirq+0x65/0xc3
[<c0104d55>] do_softirq+0x54/0xbb
=======================
Once the soft lockups start, the machine becomes unresponsive and has to
be power cycled.
bond1 is a dual-port syskonnect sk-98xx with both ports bonded in
active-backup mode.
kernel is 2.6.20.1 with the web100 kernel patches from http://web100.org/.
I'm building a plain 2.6.20.1 without the patches right now and will test
when it finishes compiling.
lspci for the card shows:
fresno:~ # lspci -vv -s 02:01.0
0000:02:01.0 Ethernet controller: Syskonnect (Schneider & Koch) SK-98xx Gigabit
Ethernet Server Adapter (rev 11)
Subsystem: Syskonnect (Schneider & Koch) SK-9844 Gigabit Ethernet
Server Adapter (SK-NET GE-SX dual link)
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR+ FastB2B-
Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort-
<MAbort- >SERR- <PERR-
Latency: 64 (5750ns min, 7750ns max), Cache Line Size: 0x08 (32 bytes)
Interrupt: pin A routed to IRQ 22
Region 0: Memory at febfc000 (32-bit, non-prefetchable) [size=16K]
Region 1: I/O ports at e800 [size=256]
Expansion ROM at febc0000 [disabled] [size=128K]
Capabilities: [48] Power Management version 1
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=1 PME-
Capabilities: [50] Vital Product Data
-Chris
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